Fluid-pressure ram.



A. PARENT. FLUID PRESSURE RAM.

APPLIOATION FILED AUG. 9, 1902.

Patented Manz, 1909.

2 SHEETS*-SHBBT l.

A. PARFITT. FLUID PRESSURE RAM. APPLIOATION FILED'AUG. 9, 1902.

Patented Mar. 2, 1909.

2 SHBETSMSHBET ,Zfi/ffffflaw? i ing ll at a point directly opposite the terior diameter thereof is a cylinder F. The interior surface of the outer cylinder is closely engaged by' the flanged washer A2 and cup shaped packing A. The end of the outer cylinder adjacent to the closed end of the i11- terior cylinder is provided with a screw threaded cap F which has formed integrally therewith a pointed projection j". The end of the outer cylinder Fv opposite the cap F is provided with a vflanged ring F2 between which and the end of the cylinder F is clamped a packing ring f2 preferably of leather which closely engages the exterior surface of the inner cylinder A.

4A conduitvG extends through the outer cylinder adjacent to the end thereof at which the cap F is'located and communicates with the interior of the outer cylinder. A second conduit G2 extends through the outer cylin-y der F at the opposite end thereof and 1s in screw threaded engagement therewith, as shown at g2. A supply conduit vGris-connected by-means of a T-coupling q with bothk of the conduits G and G2.-

Locatcd in the conduit G isar three-way valve g by means of which the closed end of the outer cylinder may be placed in communication either with the supply conduit G or an exhaust port h. A cheek valve 1P is preferably located in the conduit G between the supply conduit G and the three-Way A four-way'valve H controls the supplyand exhaust of pressure through the conduit Gr2 to the opposite end of the' outer 4cylinder F. l

Communicating with the valve casing ll in which the four-way valve 1I is located is a conduit G3 preferably made 'of ilexible hose:l which extends from a point o posit/e to the point of connection between t ie conduit G2 and the vvalve casingli to asection of pipe y inserted through registering openings mm` the end of thel cylinder'A and the fel-rule B. An exhaust port lt is formed in the valve cassection leading from the T-coupling g Located within the opening in the ferruleY B but extending within thcl opening in the bushing (l is a chuck or punch vholder A punch E is inserted in a socket formed in the chuck l). The punch and chuck or punch holder may he connected'together by any suitable means, as for instance a pin d extending through the`l holder and partially surrounded by a groove e forme( m the punch E.

K indicates a clam in ring-theoutwardly extending ends of w iic are 'engaged by a set screw c to secure the clamp around the. y

exterior surface of the the cylinder A.

The operation Vof'myinvention is as follows: The conduit G is connected with a source of motive fluid suppl by means of a projecting ,portion of ying (l.

Pire" ""inOC and the .flexible pipe sothat the too may be located is moved outwardly with respect to the outer cylinder, thereby separating the point of projection j and the punch E a distance cq'ual to the space between the fixed sup )ort and the object to be worked upon. l`l1e check valve ll2 retains the pressure between the cylinders, thereby maintaining the same in thc distended relation to which they have been adjusted. j The four-way valve H is then turned in position to connect ythe conduit G2 with the supply conduit, thereby permitting fluid under pressure to pass into the space between the outer surface of the innercylinder A and the inner surface Aofahef i outer cylinder F. The -lluid pressure then passes through ports a4 formed through the inner cylinder adjacent to the closed end thereof thence linto the annular groove l formed in thc outer surface of the piston L, thence into the passages Z to the chamber Z2 formed in the end of the piston L., The. luid pressure consequently impels the iston 'towards the end ol the inner cylim er in which is located the punch holder.- The forward cnd of the piston is reduced, as shown at L', so that the same is of a less diameter than the opening through the bush- Th'c reduced portion L of the piston consequently delivers a blow upon the pt inehv holder l) which is communicated to the punch E to perform the desired function. )urinef the movement of the piston just described the space within the forward end of `the cylinder-isin communication with the atmosphere through the ports c in the bushports u. through the end of the VcyV inder. j f

After the piston has delivered its blow the four-way valve is` turned to the position shown in Fig. 4 when thespace between the surfaces of the cylinders is placedin communication*with the exhaust port z/ and the conduit G" is-'f--latc'ed in communication with the su )ply conduit. Fluid pressure then flows through the conduit G3 into the pipe. section 11 thence through the groove cv formed in the surface of the bushingy Cl adjacent to the inner end of the pi e section thence into .the annular groove where it 1s exerted upon the annular piston valve C forcing the same intothe position shown in Fig.' 2 in which it closes the exhaust ports a,s

leading through the end of the inner cyl- The Lports c3 through the bushing 1M JIO inder C are however of a diameter greater than scope one within thc other.

the width of the annular piston valve and hence suoli ports `c3 are placed in coininunication with the ycircular valve chanilicr Within i'if'liich the piston valve. is located,

thereby permitting fluid ,pressure to pass into the front end of theinnercylindcr A and force the pistou rearwardly to its initial position shown in Fig. 1. lf it is necessary to delivers second blow the four-'way valve may be turned so as to connect the conduit AGr with the exhaust port h, thereby permitting the fluid pressure behind the annular piston valve C' to escape so that the 'tension of the spring c2 lwill force the valve l'roni the )osition showi'r in iFig. 2 to that shown iii ig. 1, thereby placing` the front end of the inner cylinder iny'communication with the atmosphere through the ports c through the bushing and the ports a3 through thc-end ofthe cylinder.

When the tool has performed, the obect desired the thrceriay rocky is turneil so that the conduit G is placed in communication with the z-itinosphere, thereby exhaust ing the pressure between the closed ends olv the cylinders and permittingr the saine to tele-- then be located. 4in position to operate upon another objecty as fortinstancc another rivet or stay bolt when the thrce-way lcock g` is again manipulated to permit the passage of fluid pressure into the space betweenthe closed ends of the c .linders to sepernte the same the requisite iistiince. The four-way cock may then be. again manipulatei'l in the manner above described, y

When it is desired to retain the cylinders in an ad'usted relation the clamp l may be placer around theI inner cylinder' A` in Contact with the end of the outer cylinder and there secured by means olY the set screw lr,` 'lhe clam may be readily removed or located at a di erent point `on` the cylinder when deare smaller insi'zr thainthe ports o conse uently when V'the stoii -`is iu thc vposition siown in Fig. 1,'tli'llovy' of (luid pressure through the passa;n imparts a compari'itvcl ment t'o the pistonw however acctilclruted"by 'the' opening of thi` ports a* when the saine are uncovered by the slow initial niovc' The tool may s `l"to the chamber l end of the piston. By such means a violent recoil at the instant iluid pressure is admitted through the ports af is avoided without how# ever diminishing the force of the blow which is delivered by the piston.

It is obvious that when the tool iste be used in an inclined or in an upright position the piston L will return to the 4position indicated in Fig. l by gravity and hence the means for exposing the front end of the piston to liuid pressure to return the saine to its initial position may be omitted;

While l have described more or less vprecisely the details of construction I do not Wish' to bc understood as limiting myself thereto,

fis l contemplate changes in form, the pro-` Y.

portion of parts, and the substitution Vof equivalents, as circumstances may su gest or render expedient, lwithout departing rom the spirit of my invention.

Having now 'lully described my invention wh at I claim as new, and desire to secure by .Letters Patent, is-

l. The combination with `a iiuid pressure operated tool comprising n o linder anda reciprocating pistou therein wing va piston head', of a second cylinder within which the iii-st cylinder closely iits, a bearin projecting i'roin the closed end of said secon( cylinder, a conduit leadin a branch con( uit communicating with the space between the adjacent closed ends ofthe troni a fiuid'prcssure supply,

cylinders, a check valve in said `branch um duit for retaining,` fluid pressure between the cylinders thereby forcing said bear-in against a support and the liront oi' the too against the work, and a second branch conduit for supplying and exhausting fluid pressure to. and from the first cylinder to drivc'thc piston forward therein.

2. The combination with a iluid pressure ice operated tool comprising a cylinder and a, ref

ciprocating iston therein, of a second cylindcr within w ich the first cylinder closely fits,

a bearing;v` nrojecting axially from .the closed end of siii second cylinder, a conduit leading from a .fluid pressure supply, a branch conduit conununiratinel with the' space between.y

ith-c adjacent closed ends of the cylinder, a

cheek valve iu said brauch conduit for re.- tainingr `lluid pressure between the cylin-4 ders, thereby forcing said bearing against a.

rating with said supply conduit, and a msnually operated valrc'in said second branch vconduit controlling the supply and exhaust.

iii-

support and the liront cud of said tool against the work, a socond branch conduit communi# i I ot' .fluid `pressureto and from the opposite .ends of said tiret cylinder to' reciprocate the piston therein. V

3;' :The combination with a lluid pressure operated tool comprisingr a cylinder and a re ciprocating pistouthereon, of a second cylinder within which the iirst cylinder closely lits, a bearing projecting axially from said second cylinder, 'asupply conduit leading from a source of fluid pressure, a branch conduit communicating with the space between the adjacent closed ends of the cylinders, a 5 check valve in-said branch conduit for retaining fluid pressure between the cylinders, and thereby forcing said bearing against a support and the front end of said tool against the work, a second branch conduit for supplying and exhausting fluid pressure `to andV l from the rst cylinder todrive the piston forward therein, a third branch conduit for supplying fluid prlessure to the opposite Aend of said first cylinder to drive the piston therese in rearwardly., and a manual 'y operated valve for controlling the supply and exhaust of fluid pressure throughsaid second and third branches.

4. The combination with a fluid pressure o erated tool comprising a cylinder having a c osed end, a reci rocable piston therein having a iston head) and a punch at the end of the cy inder op osite to its closed end ada t- 'ed to receive t e im act of the piston, o al der closely fits having a closed end "and an open end closely engaging the exteriorfsurface 'of the inner cylinder, a conduit communicating with the space between the closed endsof'said cylinders, means for controlling theflo'w of fluid pressure 'through s aid conto-relatiyely move said cylinders and thei 'by forcel the end of said second cylinder I linto engagement `with 'a fixed-supportandv said punch into `contact with the workfa scclond conduit communicating with the s ace` between theouter cylindrical surface ofp the inner cylinder in. advance of the piston head thereof and the inner surface of the outer cylinder, .said. inner cylinder having ports therethrough leading to vthc working end thereof, and means for controlling the flow of fluid pressure through said second conduit to the working end of the inner cylinder.

5. The combination with a fluid pressure olperated tool comprising a cylinder having a c osed end forming a piston head, a recipro. cablcpiston therein and a punch 'at the end of the cylinder opposite to its closed end adapted to receive the impact of the piston, vof a second cylinder within whiclnthc first (,eylindereloscly fits having a closed end and an open end closely engaging the exterior surface of the inner cylinder, a conduit comclosed ends of said cylinders, means for controlling the flow of fluidv pressure throifgh said conduit to relatively move said cylinders, a second conduit communicating with the space between the outer cylindrical surface of the inner cylinder and the inner surface ol' vthe outer cylinder in advance of the piston head of the inner cylinder, said inner cylinder -the punch, and a .four-way valve for alterthrough WhichffluidY pressure asses t'o-the second cylinder within which the first cylinycombination wit having ports therethrough leading to the :5 working end teefa third conduit for fluid pressure communicating with the end of the inner cylinder adjacent to the punch for eecting the stroke of the piston away from nate y admitting fluid and third conduits.

Q The combination with a fluid pressure operated tool comprising a cylinder having atclosed end, a reciprocable piston therein and a punch at the endof the cylinder opposite to itsclosed end adapted to receive the impact of the istony of a second cylinder l within which t e first /cylin'der closel -fits having a closed eni and an open end4 c osely engaging the exterior surface of the'inner cylinder, a conduit communicating with thel s ace between the closed endsof said cylin` ers, means for, controlling the flow of fluid pressure through said conduit toA relativelyl move said cylinders and thereby force4 the- 85 outer-end of said second cylinder into engagement with va fixed support and said punch into contact with the work, conduits pressure to said second opposlte ends fof said inner ey inder, anda four-way valve controlling the admission and exhaustof/pressur to theioppositc ends of said inner-cylinder. Y Y

7. In a fluid ressure operated tool, the combination wfthfacylinder having a nor'- mally open exhaust port leading'froin the front end thereof, of a reciprocating piston therein, conduits through-which fluid pressure flows to the opposite sides of said. piston,

and a piston valve located within' and in the 100 path of the fluid pressure flowing to the for- /f/j] Ward end of the cylinder closing'thc exhaust port therefrom during the admission of pressure to the forward end of the cylinder.

8. In a fluid a cylinder having an exhaust port leading from the front end thereof, of a reciprocating piston therein, a punch adapted to receive the impact of the piston,

lconduits through which fluid pressure flows to the opposite sides of said piston, and an annular piston valve located within thc cylinder concentric with relation to said punch and controlling the exhaust port from the forward end of the cylinder, said piston valve 1.15 being located in the patlrofthe fluid pressure passing to the forward ond of the cylinder and actuated thereby to close said,v exhaust port. l

9. The combination with a fluid pressure operated tool comprising acylindeiya reciproc'able piston therein and moans for controlling the supply and exhaust of lhlidpressure to said cylinder to reciprocate the piston therein, of a second cylinder within which th e first cylinder closely fits, a conduit for fluid messurc extending through the -outer cylin er to the space between the adjacent ends of the cylinders, a check valve located in said eonifluit opening towards` said space,a

prcssureoperated tool, the 105 I v1 Cylinder within which thv first the lston and means separatepipeoradmittingudtoreciproeate for controlling the flow of uid pressure thronvh seid eondnit to relatively move said cylinders and thereby force the outer end of said second cylinder into engagement -with u 'fixed support und the forward end of seid tool against the work. 710. The combination with u iluid pressure operated tool eiuinirising,r u cylinder haring a closed end, :t reciproonhle piston therein, means for controlling tho supply und exhaust of uid pressure lo uuid uyliudrr lo roripronate the piston und u punch :n tho oud ol' l ho cylinder opposite to its closed ond ndupiod to reeeive the impart ol' the piston, of :i sor-oud ryliudrr ond und :in opon thvv eXltiior suf"- n' conduit riunolosely lits having)r n olosod end both closely enguging lure of the inner oyhnder,

ends of sail cylinders, a eher-,k Volvo in Suid conduit openiin'Jr towards unid son. o u separate pipe for admitting :fluid ente the piston, and n, three-way vulva trolling the admission und exhaust of pressure through said conduit to und the Space between the closed ands; of mid (gy'linders and thereby forro the ontnr 'i o1" `mid second Cylinder into engagement un il n, fixed su )port und Suid punch to roninrl with the worlc.

.ln testimony whereof, .I sign thi@ spe-siii lion in thvl presence of two wltnennes.

muniezttngP with the space between the closed Wi tnesses .Clica L. WiLxuNsoN,

(,innn llfNNiNunAM.

to reripro-- Voir Ill? 

